text: #!/usr/bin/python
  # -*- coding: utf-8 -*-
  
  
  def my_function(a, b):
      """
      >>> my_function(2, 3)
      6
      >>> my_function('a', 3)
      'aaa'
      """
      return a * b
  
  
  if __name__ == '__main__':
      import doctest
      doctest.testmod()
  